Since it's post tax, I'd put about 50K in a quick savings account I have everyday access to. Pay for both kids college (about $75K more each into their 529's). Pay off the mortgage and car and get a new roof/remodel - about $40K total. Buy a new house - nothing big about 500K or so in a bit nicer area. Maybe buy a couple of rental duplexes. Hire a financial advisor to make about $2 million turn into a stream of passive income with investments. Quit my job to run the rentals and investments.
Well, I would invest half of it in Mutual Funds and give the rest of it to my friend, Saheib, in Securities.